<!-- 父组件:控制除登录页以外的所有子组件的公共头部和左侧菜单栏  -->
<template>
  <div style="display: flex;">
    <!-- 左侧菜单栏 -->
    <div :style="{width:(isCollapse ? '64px' : '208px')}">
      <el-menu
          background-color="#3282f5"
          style="width:100%;height:100vh;"
          text-color="#fff"
          active-text-color="#ff0"
          :collapse="isCollapse"
          :collapse-transition="false"
          unique-opened
          router>
        <!--  左侧菜单栏顶部条  -->
        <el-row style="padding-top: 10px;">
          <el-col :span="2"></el-col>
          <el-col :span="7" style="padding-left: 7px;">
            <el-avatar src="/imgs/admin/logo.png" style="width: 35px;height: 35px;"></el-avatar>
          </el-col>
          <el-col :span="isCollapse ? 0 : 13">
            <span style="color:#fff;font-weight: bolder;position:relative;top:8px;left: 2px;">
              智慧车辆
            </span>
          </el-col>
        </el-row>
        <el-sub-menu index="1">
          <template #title>
            <el-icon style="font-size:21px;"><User/></el-icon><span>用户管理</span>
          </template>
          <el-menu-item index="/user">用户列表</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="2">
          <template #title>
            <el-icon style="font-size:21px;"><Van/></el-icon><span>车辆管理</span>
          </template>
          <el-menu-item index="/vehicle">车辆列表</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="3">
          <template #title>
            <el-icon style="font-size:21px;"><Location/></el-icon><span>围栏管理</span>
          </template>
          <el-menu-item index="/geofence">围栏列表</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="4">
          <template #title>
            <el-icon style="font-size:21px;"><Place/></el-icon><span>调度管理</span>
          </template>
          <el-menu-item index="/application">用车申请</el-menu-item>
          <el-menu-item index="/audit">申请审批</el-menu-item>
          <el-menu-item index="/distribute">车辆分配</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="5">
          <template #title>
            <el-icon style="font-size:21px;"><MessageBox/></el-icon><span>字典管理</span>
          </template>
          <el-menu-item index="/dict">字典列表</el-menu-item>
        </el-sub-menu>
      </el-menu>
    </div>
    <!-- 右侧主体内容 -->
    <div :style="{width:(isCollapse ? 'calc(100% - 64px)' : 'calc(100% - 208px')}">
      <el-header style="padding-top: 22px;height:10vh;background-color: #fff;">
        <!-- 右侧公共顶部条 -->
        <el-row>
          <el-col :span="18">
            <el-icon style="font-size: 21px;" @click="changeCollapsed"><Expand/></el-icon>
          </el-col>
          <el-col :span="6" style="position: relative;">
            <el-dropdown trigger="click" style="position: absolute;right: 20px;">
              <span style="font-size: 19px;font-weight: bold;">
                {{user.username}}
                <el-icon><arrow-down /></el-icon>
              </span>
              <template #dropdown>
                <el-dropdown-menu>
                  <el-dropdown-item @click="logout">退出登录</el-dropdown-item>
                </el-dropdown-menu>
              </template>
            </el-dropdown>
          </el-col>
        </el-row>
        <!--  面包屑导航 -->
        <el-breadcrumb separator="/" style="position: relative;top: 20px;">
          <el-breadcrumb-item>首页</el-breadcrumb-item>
          <el-breadcrumb-item v-for="item in breadcrumb">{{item}}</el-breadcrumb-item>
        </el-breadcrumb>
      </el-header>
      <el-main style="height: 90vh;padding: 0;overflow-y: auto;">
        <!-- 右侧主体内容(可变区域) -->
        <router-view/>
      </el-main>
    </div>
  </div>
</template>

<script setup>
import {onMounted, ref} from "vue";
import {useRoute, useRouter} from "vue-router";

// 获取当前登录用户信息的函数
const getUser = () => {
  try {
    const userInfo = localStorage.getItem('user');
    return userInfo ? JSON.parse(userInfo) : { username: '未登录用户' };
  } catch (error) {
    console.error('获取用户信息失败:', error);
    return { username: '未登录用户' };
  }
};

//定义变量用来控制左侧菜单栏是否折叠
const isCollapse = ref(false);
//定义操作菜单是否折叠的方法
const changeCollapsed = ()=>{
  isCollapse.value = !isCollapse.value;
}
//获取当前登录的用户数据
const user = ref(getUser());
//定义退出登录的方法
const logout = ()=>{
  if(confirm('您确认要退出登录吗?')){
    //清空登录时存入的用户信息
    localStorage.removeItem('user');
    //跳转到登录页
    window.location.href = '/login';
    //清空当前登录用户数据
    user.value = '';
  }
}

//定义数组用来保存当前面包屑导航展示的值
const breadcrumb = ref([]);
//定义对象用来维护路由path与面包屑值的对应关系
let map = {
  '/user':['用户管理','用户列表'],
  '/vehicle':['车辆管理','车辆列表'],
  '/geofence':['围栏管理','电子围栏'],
  '/application':['调度管理','申请列表'],
  '/audit':['调度管理','调度审核'],
  '/distribute':['调度管理','用车分配'],
  '/dict':['字典管理','字典列表'],
  '/geofenceMap':['围栏管理','绘制围栏'],
  '/dictOption':['字典管理','字典项列表']
};
//useRoute()是Vue路由器提供的一个方法,用来获取当前路由对象
const route = useRoute();
//定义更新面包屑值的方法
const updateBreadcrumb = (route)=>{
  //从传入的路由对象中获取当前的path
  const path = route.path;
  //从上面的map对象中获取当前路径对应的面包屑值
  breadcrumb.value = map[path];
}
//页面渲染完毕立即执行,也就是一进入页面就会触发(刷新页面)
onMounted(()=>{
  updateBreadcrumb(route);
})
//获取路由守卫,监听路由,只要path发生了改变(包括点击左侧菜单栏)
//就:先立即更新面包屑的值,再放行到要去的子路由
const router = useRouter();
router.beforeEach((to,from,next)=>{
  updateBreadcrumb(to);
  next();
})

</script>







